After you uninstall norton make sure you go back into add/remove programs and get rid of the norton updater and all the rest of the crap symantec installs. You'd think they'd be bright enough to understand that if you're removing their product, you probably don't need or want an updater for their product to remain behind. Depending on which version you have there will be 1-3 additional components to get rid of. Next thing to try out is Open Office. No need to drop a couple of hundred bucks on M$ Office. Comodo firewall is a great free app too.
Cheers,
Shawn